COLORIMETER

This colorimeter is provided with first and second illumination units disposed symmetrically with respect to a reference line in a prescribed plane, first and second light-receiving parts disposed symmetrically with respect to the reference line in the prescribed plane, a calculation unit for determining color information about a measurement object, and an opposing wall that opposes the measurement object when the measurement object is to be measured. The opposing wall is provided with an abutting part that abuts the measurement object when the measurement object is measured. The abutting partis provided with: a pair of first abutting parts disposed on two sides of a measurement opening so as to flank the measurement opening; and a pair of second abutting parts disposed on an orthogonal line that is orthogonal to a first-abutting-part connection line that connects the pair of first abutting parts to each other, the pair of second abutting parts being disposed on two sides of the first-abutting-part connection